Improvement in tumblers for permutation-locks



UNITE 'Sfra'rns v.afrnwr @Freien HENRY IY. COVERT, OF NFV YORK, N. Y., ASSIGNOR TO M'ARVINS SAFE l COMPANY, OF SAME PLAGE.

lIMPROVEMENT IN TUMBLERS FQR PERWIUTATION-LOCKS.

Specication forming part of Letters Patent No. 151,277, dated May 26, 1874; application filed January 10, 1874. l

To all whom fit may concern:

Be it known that I, HENRY W. Govnn'r, of the city, county, and State of New York, have invented a new and useful Improvement in Combination-Locks, of which the following is a specification:

The invention will iirst be fully described, and then pointed out in claim. i

In the accompanying drawing, Figure lis a view of the rea-r side of the lock with the rear plate removed. Fig. 2 is a cross-section of Fig. l, taken on the line a' x. Fig. 3 is a side view of one of the coinbination-wheels, showing'the slots for the movable pin and the open slot for releasing the bolt. Fig. et is a cross-section et' Fig. 3, taken on the line y y.

Similar letters of ret'crence indicate correspending parts.

The general operation of this lock is similar to the combination-locks now in use-that is,

having a spindle, dial, and drivin g-wheel, with one or more revolving combinatien-wheels.

A is the dial-plate. B is the spindle. C is the driving-wheel, made fast to the spindle. D represents the door to which the lock is attached. E is the back plate of the lock, which has a socket-center, F, around which the combination-wheels are revolved. G represents the reversible combination-wheels-one or more of which may be used-which are .made to revolve around the socket center F by turning the drivingwheel C, and are each numbered to indicate the combination. H represents slots in these wheels G, more or less in number, according to the number of changes which it is desired to make. These wheels have figures or numbers upon each of their sides, so that they may be reversed as may be required. I is the changeable pin, having a stem, J, and two jaws, K, with an open slot between the jaws, which receives the rim L of the wheel. rIhe stein J tits into and ills the lower portion of the slot in the wheel, and the jaws K K project on each side of the wheel, as seen in Fig. et, so that when one of these pins is placed in any one of the slots II ot' the combination-wheels the first wheel will be revolved by the stationary pin N in the drivin g-wheel, which pin will strike one ofthe jaws. The opposite jaw of this pin in the iirst wheel will strike the pin in the neXt wheel, and revolve that, and so on for any number of wheels. rlhis pin I may be changed to any of the slots Il, and the combination is altered by such change.

By making these pins with jaws projecting on each. side of the combinatien-wheels, those wheels may be reversed, and by making the pins changeable the number of combinations is greatly increased.

These pins I are held in posit-ion. by the open slot between the jaws K K, which receives the rim of the wheel, and by loose washers O at their inner ends, which keep the stem J flush with the sides of the wheels.

By removing the washers O, or one of them, the wheels, or 011e of them, are readily taken from the center F and reversed, or one or more of the pins are changed, as may be desired.

By changing the pin from one slot to another, as already described, the number ot' combinations is greatly increased, and the lock is rendered far more intricate than it otherwise would be.

By reversing the wheels the combinations are greatly increased, but by changing the driving-pins, with numbers arranged between the slot-s, as represented, the power of the lock is increased according to the number ot' slots in the wheel or changes ot' the pin.

\V heels for combination-loeks have been made in two parts, in one of which is the slot for releasing the bolt, and in thc other the pin `for turning the wheels, and having numbers to indicate the combinations whenever the relative positions et' the pin and slot are changed.

l-Vheels for combination-locks have also been made of a single piece, and having a pin in each side, so as to make them interchangea` ble and reversible.

The outer row of numbers indicates the combination when used for the first wheel on the post, the second row for the second wheel, and the inner row for the third wheel.

The wheels are numbered in such a way that the combination may be read or known in whatever position the wheels are placed on the post without resorting to other means to determine it.

Having thus described my invention7 l claim as new and'desire to secure by Letters Patent- Y The combination, with movable pin and numbered Wheels7 of jaws K K,l1a\fing open y slot7 between them, and washers O7 all een. strueted and arranged substantially as and for the purpose speeied.

HENRY TV. COVERT. Witnesses:

T. B. MosHER, ALEX. F. RoBERTs. 

